SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8170d631a3e07eb33553a78a485600328009afd1a62bb1d494c2ab12b290af75' 
  AND token = 'qAgriq4UU1w9KWXGrEZ0QJGff/xhd8vqXvauF/9REZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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