Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a5305f3f7ea42cfb7686928c663f17cf77631c99900072719ff533d00820f7a1' 
  AND token = '7q2dOjLEttcDnXt50j9RoZriE9WQoKCyEG/ENSFoAYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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