Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e70b69adc767447e5dfd903c374e54f24ebd892552b4fbc7c074f8be21a006c2' 
  AND token = 'jMUM1C+jM2RKqQDWZ8lycqXQpdRFJtlcy+Dhni187yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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