Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf83077a58c289e49f5b8ff7b479fd0cbb0c78f22b4bac71734397bce16c496a' 
  AND token = 'Uvu9HoeSTPsRJjecDCjcfWWYEoZtXmMQ9V0WiiTxCHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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