Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16f5da580c566bd8584a8f4a3024cccb83debcc54ec66b3a12fb39b3b56b5925' 
  AND token = 'ctqY1JM8vrFrnsc24fVeeHilYvbVZcmIr8/TKsuk7OY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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