Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '791554f382a98e433416ac2177a9ecc39b9ec078995b3884579f62e32d4eb147' 
  AND token = 'fOyqtpnPMkzXm/3iauOAPRP7a01ptkxkpsRhr0C81f8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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