Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e84884e056c5064139704774418300b2e998c1a3bf5db9ad6dd415a86f6d18cf' 
  AND token = 'EKjWvEyv3rXMseA2s8VJ51d86IYO30L8LZJGvUPatEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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