Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5b1943f16b03727093638a16abf9c6da4404da5628c273bc379422e58d85e6cc' 
  AND token = 'fE6XFy4HOfhv+QDQ9QPQ2xlEyDyLOjk0e2g4ddlq3dU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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