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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '70ccaba5083088a69074be6e43ef9897c4686b906057a323f0eecdee5e4b3356' 
  AND token = 'F5RTosTWZHtcQ2Qsy2ezzpoysYSR5B1PMFu6SRLxSxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}