Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e008d25b4b51e5e3357b365e48549dc296e7d1ea6b928f8213417c4ab999e978' 
  AND token = 'eT8TCk3wMO9jY2QSzex6mIsjriGjud0wASpxj92IcUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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