Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f293ad4e5f33c13d7de11a4a031627a14ef37aba27e7d842a1eb021c0a60c0c9' 
  AND token = '82KMrX+R3e4u29V63B4ndl30rmqiaBvT/DAwELdIRHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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