Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '52bfa803827d058e9fdd707a40430cffb1806169ef260e853500f31079ab69f3' 
  AND token = 'QXfruKB+1ykk9RYfRsdDU9fKNbmz5wk0S50Pyk+w5Ag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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