Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2aef06c97662d3b52dd429cf36222723448b0f4d04219469eec0da7e0992d36' 
  AND token = 'shrfUeAFqA8HD8iVFd8xMLsbT3PJzsHoTWH0deL+fUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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