Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9cecdabee92b3d79e2ce76e8374d4c09329d6b797a76e89112f7f7de68db898' 
  AND token = 'DKw/l0IhSOcgWcv4SiIlXK5snp9OY2SWpFJt9gnusXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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