Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19f703623120b366b69cad1930038a5be96b3f85183dbdaa9bcac3f5c05ebadc' 
  AND token = 'nHkudlpTHnSH4QppIy+V/T4RjsPiTgUYS3DeamSO9AA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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