SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bc8fd397932d408bc5e414a08d7f08b65ddf139d68d792c199a140df3a72ef1' 
  AND token = 'EMCD6qvuL2ejKx9U+HVRx+GgJHzpqv8ActrgJnsTZcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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