Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c07ba3bf1c850acdf2f05507627f785048fac59552ee0b640fbd93ad77359281' 
  AND token = '9t5ew7XB+xVN69BEsQjOpbxnf9RJfuYxyhtN1UXdeHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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