Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2183be98addf15dc1d48a179be656cf4668c625d5cb043c822a425446ac5c2e' 
  AND token = 'yrQ5lGQTXgCzngboRYgSA/U4yY54rI6AuPdPBVrKdck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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