Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f4ca04e646d1620415561578d435069a78d397772f31235b0d5a17e4c0f4875' 
  AND token = 'aNOSeSU8aNGrH9IvcPNUBctjeXkZyJqHRBSu1B00n+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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