Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30ddaa0892d3565d12deb0e646ca1eb1209a851b2697d71ed9a520a3c46c1675' 
  AND token = 'uFy/GGGDqPfnFDxkStR9/jUHP4brLcAOaUre2g/iKpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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