Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4fed5b97f4672f6bc70b1d1066b0e1bad5962ebb4ef84294b72cb4103a5bc4ab' 
  AND token = 'ztPyjfjSfbuqWeq/sKbJ6F8zOc8P13QQjLhblyDKgvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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