Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '74229de1e1a6aa8c58e25e4592d1b5b6daf1292f86a01d0b27291150b7ca312d' 
  AND token = 'g62RQi/OAUM4poKGje1QXqwsFg9rnjjWLc9tIsk1rfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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