Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'df3657146b5fd6d09286b032d42b036a54ddc2934222b902d89be70f399d0acd' 
  AND token = '1F9ek7/8D1Ust7/Ki5c7U8KAyjhh1thR4NdJInZAay0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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