Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ada1b2b3a8a058f4d0135d6a71124a47760e7cf283e54590709ede3baf64330' 
  AND token = 'PgS8i4LzhbbunjFTOE4mNJ9+sGgCIm2TGGVOzpRBXg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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