Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b5f099ba15f4003a8c0a6a6b9860834848965962d595fdc074e3697e08440cd' 
  AND token = '2/CzdKqjxvMm8CNCWir+2hPeXL23X1dqcmmQPW8h/DM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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