Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b2323e514c008f90d421410f5209ba89757f2309996f0597aa9cd2c6eb93a0f' 
  AND token = 'x3OnY53Ni2aDthEI5Ech5CLMLyOHOWpEvwcJG7ZY/Ys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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