Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d618e596baec7a33ee0b908d85c8dbb8662e5593145c475d3aeab19c6b5237b' 
  AND token = '6y8gknH3xrmWVEP9EwdA4xfv3jy89GA/QxIsXr438ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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