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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8cb4161f1edbff26071f0f65b88839aa699c966ab7722ea81d6069f7203cff01' 
  AND token = 'Dxpfh1cJz6VB1l3V24C5uaHFVM5OKftrlhyDroQ4bZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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