Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f103b5cdd27b5aa3859abce17fcc56ad2045865d5d29cbfcbaba1ee3d5f36049' 
  AND token = 'wmncYigatt3ytAuwkMvLVvph3pu8R0CjOSx6QvSaC/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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