Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '679e366f7c073eb637a17aabc7eb787d2277adb41a7089c7ec77775e70d36f09' 
  AND token = 'MmitfA11eGF+NXFoN5qLNifguR5ZCgxdq2yft8rkdH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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