Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4f556789154c319db1fae9964cf17c25513f1e699a1ea5c6a16da040362e597' 
  AND token = 'cO75UcJU1qRxQdG8WjhLGLXMOADnLdXgU+JPCm4KNnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}