Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '532079fc082ea06a6e2bf545e916bd4d62648639afe3c1b2440eee7aa753a101' 
  AND token = '0e/tQhyU3q2Rg82BcONUNOuZNWwhCZleZuqjt79ux/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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