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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7991fba07245c2148a7c3be202f6fa2a3d0c8212b3e75fccf77aa3efd661c34e' 
  AND token = 'V5pZWM8ECxKKfo2SrQ+7oj9A6l2p8h0AZLr+VC0pnxo=' 
  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"
    }
  }
}