Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f156c1a55bf436ba50fcdd9e83b63927534a133e9da0da9b740d9fdd56b7970' 
  AND token = 'fSdrg6bVt6rFsdlBEffm1ZAvX8a36j3s8K2UuzpFuXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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