SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '617d1e795aef443c68a8f22b8f83cc5f88c4dc0de91b9cf6b00622cf79131a11' 
  AND token = 'ZevxGc9tvvyoBSxJ4WTy0trIjwUzqN38tNJGmGhUIys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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