Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '006fa863894ae3bcdca0a0c2933663e37f4a989acf91508364d53d70afaec9c8' 
  AND token = 'KnszdMARfSOs9+6UdjFLW4YSUDGLxwRpHVKmqMHtlK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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