Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39f7a38e75997c5aca47a0986b9b2f3bca9218e5dc1f512ad134a4cff6761308' 
  AND token = '7sB0eDi3sNOmtMq0Y82BeKxhFO086EZ8UBlkYx1Qd2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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