Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9532ae84deab4c1786b2df4c081ec4b24ef633b24f56665a1889ff085e22ed99' 
  AND token = '8xm/DvjNw0TmIfEqDkOJZXmIUyuDWW9aOmtPFu04Juc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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