Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae39ab0f1b05da87c85b5fc2e84f1a5a8b26ccbc845515822cf0fea21ea89c73' 
  AND token = '2vLEq+GXesBoml7DDwwB+4mdKknDgdERNgYeZO0biiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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