SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '149188597dd8fbec12ed5bd8fc4f8e2d4f24c745139f428c421063fdc8d2460b' 
  AND token = 'YsqM9x/1sy68mo/sZT3q1gBsAG9nleWx6iQ+URRKWVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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