Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afd6956eed70bf0e7555efad4703934872741c0c50ffdb11d11669d535e2fdd0' 
  AND token = '7NBEtqTk5zhaFk2GzcnJrZ6bUKR2sPLGogO1dXR6FhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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