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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05fc3a78bc1249deb95d662c13a97b36249fff4aa8a799db0e407cf95e6d7f5e' 
  AND token = 'AQF1TwKMu3feKFW5Ul7yaiQsXWeIS3PGci+I0+n0dyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00110

JSON explain

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