Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3818e33a363e7f2369b089f2763fc57bd972b0c526c55cf975b47a025c50f78a' 
  AND token = 'y6eXLhVqLqJn1z7hDS2+veQZXsR1jNn34UqQlrLOOrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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