Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5a2d41fc3faaa91e6fad3f5dd779be01f6a81e4902dd82ff1a243473b1c0c3b6' 
  AND token = 'rR0e1VS47CdMzgE+956rydRkU6wGGE52oo8itMDJdC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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