Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34bebce80d0663692ea1a14985ca8532bb7898f0a3306b5635d9ea273bad5865' 
  AND token = 'BquriXsNBN09S9TC5bH974kGZNVeD0BQyS7VV95o7HY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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