Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '308a0ba599675844df92a9eb458782768c1a248ff45d65821838084123560288' 
  AND token = 'oh+MC4BlaoCTD7Gj4jYhXyidaefYglLibX7G2q3blhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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