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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8e224b80f72257ecbb8a086ef022e40b5b66be799347b38d34a526a2b6a26ab7' 
  AND token = 'JPdTosFhFHkXf73GW6YJMnDrepfzx8XbfCvfDnlsA3I=' 
  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"
    }
  }
}