Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4ce3ee39d384320dcfcecdf9099fa765541ef859cb6ae23deff25e73e728cfff' 
  AND token = 'cnDMrNtOxFYzjERAxFTU7ECVxZz+M0u1XKXaDNCgkxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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