Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa8a0a77308cdfaa0e5c1fe2d4f18070f90bb13f073500c8bd2abfdb33a40944' 
  AND token = 'iQnTeVPFoSaLiZUvKbEq7xvdh/wU04yjAsEHJ8CzhzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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