Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4569e927e0aac3e271f3063189338ee179092a1689d624fdddf75b13a7499d87' 
  AND token = 'w4P4SDBQNdN/eTZArsfwavJ+o0zcsEjxsEarNqwWR8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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