Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab57a2bdcaf52d6b8fa236c3c85222bb323dc34538bea90449030c9adec6f2fd' 
  AND token = 'N0R1Hvw3GilUNLvUMGsnCOaHOZPqnuDFpna4Y0WkiyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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