Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27f6729a857db38fc2b5032604fe62aac6946f08206b8535cbc6b100b1ba9292' 
  AND token = 'm3OnI2vHjS/HPXMYx0FNtp4SIOyMvE5vohqc1h7QcEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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