Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8a49d7d146693868025b5670b114c259b8561e503182da0fe8990b29540e29a' 
  AND token = 'vqNErIwvJp7ILbXswwGO8LdzuyiRIbCIkB8gXWeIEks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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