Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a5b8ff6cb79c316d54289ef626f76d6a2f59ec671d6b912ea74d78625ec8979' 
  AND token = 'pHJVTnvtLLbpqtTGX8Lg1RUdjdN+V8yE8DlHgxsFPAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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