SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f58fa18b09c6c1702ff9cd0217582dc3f41e2278d492a785106a4a6c5ac965a' 
  AND token = 'D3xh4Jt/2oi1EI166hvrCNcmrBKKgJFqw+D++1Qz0ng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00094

JSON explain

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