Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dac5d7824f3b820127f2feb539b514c938749d290e803cc857a5b0597c911689' 
  AND token = 'x3eal7d8l0+4afbsIvBnxGCkGBJZI24F9jRb2n328x8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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