Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb999debe6fc3f129f8bfae3d8a5d1179899b2ab8d64c62a0460acbcf791a2f6' 
  AND token = 'z5J9dpIfSVe9w4Sj+YY7l2BNr4JhNfKsoCvQvSMtKfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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