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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24c61b85ce2d7259e5b977536624851dc7faca84a37dd812e5f4a664eb9dda01' 
  AND token = 'HTnIcjutki++XaEXGOThFoZ3PvOpUEQTLyjIzN6ROk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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