Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '085d1910456972d3563d3732623f25ecc0c9439019fc12fcf6e95d54e4452734' 
  AND token = '7/b7Mt5h9wWiZIVamqDPiiYZ5buW1weXVEwCOrrtcPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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