Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e025b644749769474e70c40985b9d7a636b3200cd0506c9c03dec36af101bf4d' 
  AND token = 'MDML+BACyonVnHb/qhKkj0apfkhEJmIx122Fp/oxpx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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