Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8cc5a76d910ba2ded45bb48519f7e5fb78c1c659d5ca68bd6059634d7cb43598' 
  AND token = 'evGcYuqFckOrwz8EjY/Ck3X1qDfYZBcyEyyf6NlTxKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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