SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80c9c060cbf059cac964f2b8d62aff613a53d12f18c1eb706aef2e4821a86ccd' 
  AND token = 'oYTpSRMOQoKE97UZp+gq4UgAJESY+aw6+5tYYnwjvK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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