Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd13be7eb314b952e683fa154ebe6f8d558df7d8d6eb15ef29d1fcee9ed333be5' 
  AND token = 'iDZYR1pb44yalypXUbm4DmWj1DeHNHtfycYSNX+f7s8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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